BUT if it controls the sway, the design works and that's all that matters.

So far it's done it's job in the Saskatchewan cross winds- time will tell though. Like yours- the wind moved the entire unit, but no sway at all in the places I normally got squirrely (passing the inland terminals was always horrifying- not any more)

Why are you using a WDH with the trailer toad? I thought the trailer toad did the work of the WDH.

You must use a WDH with the Trailer Toad.

There's a hinged section across the front of the Trailer Toad that allows the Toad to travel up and down over bumps independently from the tow vehicle.

In the picture below you can see the shank of the Toad is hanging down. When hooking to the truck you just lift the shank to insert it into the hitch receiver. The hinge goes across just behind the shank:

Behind the hinged section is the main platform of the Toad that has the axle/wheels and also the vertical spindle that allows the Toad's wheels to turn and follow the tow vehicle when going around corners and curves.

The main platform section has to remain level between the tow vehicle and trailer, and the WDH is necessary to keep it level.

When hooking up, you just lift the spring bars up by hand and attach them to the support brackets.

When hooking up the WDH on a normal trailer, you have to raise the tongue with the tongue jack, and even then a lever is usually required to pry the spring bars up into place on their brackets.

However, when hooking up the Trailer Toad there's hardly any weight on the spring bars - I simply place them on the L-brackets of the Equal-i-zer brackets so they can keep the platform of the Toad level with the tongue of the trailer as the truck and trailer go up and down over bumps separate from each other.

If you're not handy, who would perform the needed maintenance on the toad, grease the bearings, steering components and such. Definitely not a common piece of equipment.

Now I see how you could use this with a travel trailer, since the draw bar is on a hinge so that you could line it up with the trucks hitch receiver opening.

Looks like this could be handy for those midsize SUVs that have a higher tow rating but a low hitch rating, hence my 2005 Pathfinder (6000 lbs towing, 600 lbs tongue rating) or my previous 2008 Sport Trac 4.6L 3valve with it's 7000 lbs tow/740 lbs tongue rating. It had a longer 131" WB for a midsize truck and a good 1288 lbs of payload after options. 1218 lbs payload after hard folding tonneau cover. My trailer now would be to much for it but with the toad, it would likely be a good combination.